/Engine/Source/Editor/BlueprintGraph/Classes/K2Node_SpawnActor.h
Returns whether or not this node has dependencies on an external structure If OptionalOutput isn't null, it should be filled with the known dependencies objects (Classes, Structures, Functions, etc).
virtual bool HasExternalDependencies ( [TArray](API\Runtime\Core\Containers\TArray)< class [UStruct](API\Runtime\CoreUObject\UObject\UStruct) * > * OptionalOutput ) const